Hi Peter,
It looks like you are off to a good start. The hydrogen Balmer lines are clearly visible so everything must be working. I note there is a bit of a wiggle in the spectrum from about 5300 to 5900 Angstroms. From the regularity in the spacing I wonder if this might be an interference effect that I have heard of with some cameras. There could be a hint of it at other wavelengths too.
Cheers,
Andy